#indexImg {
  display: block;
  margin: auto;
  width: 80%;
}
#showBtn {
  display: block;
  margin: auto;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}
#showBtn #btn {
  background: #da1e1e;
  width: 180px;
  height: 60px;
  border-radius: 46px;
  font-size: 24px;
  box-shadow: 1px 0px 16px 3px #d8d0d0;
  color: #fff;
}
.mark {
  width: 100%;
  position: fixed;
  height: 100%;
  right: 0;
  top: 0;
  z-index: 10;
  background: rgba(0, 0, 0, 0.78);
  color: #fff;
}
.mark h2 {
  margin: auto;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}
.mark p {
  display: inline-block;
}
button {
  outline: none;
}

.yingyuanBtn,
.shiyeBtn,
.kaoshiBtn {
  width: 200px;
  margin: auto;
  text-align: center;
  height: 40px;
  line-height: 40px;
  margin-top: 18px;
}
.yingyuan,
.shiye,
.kaoshi {
  font-size: 16px;
  width: 100%;
  height: 100%;
  background-color: #ef9a87;
  color: #fff;
  border-radius: 18px;
  outline: none;
}

